A Section approximately at Right Angles to the Long Axis of the Heart, exposing the Four Valves which lie very nearly in the Same Plane.
The semilunar valve which guards the aperture of the pulmonary artery is the nearest to the breast-bone.
A Section approximately at Right Angles to the Long Axis of the Heart, exposing the Four Valves which lie very nearly in the Same Plane.
The semilunar valve which guards the aperture of the pulmonary artery is the nearest to the breast-bone.